the 3rd term of an ap is 3 and 11 to term is minus 21 find its first term and common difference
reddi625sahu:
15 /2 & -9/4
is ans correct?
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first term is 9 and difference is -3
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T3=3=a+2d.......(1)
T11=-21=a+10d.........(2)
From eq 1 and 2,we have
d=-2
and a=7
T11=-21=a+10d.........(2)
From eq 1 and 2,we have
d=-2
and a=7
Oh I m wrong
d=-3 and a=9
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